# Kimi K2.5 vs Mistral Small 3.1

> Side-by-side benchmark comparison for Kimi K2.5 and Mistral Small 3.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/kimi-k2-5-vs-mistral-small-3-1
- Last updated: October 14, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Kimi K2.5 if you want the stronger benchmark profile. Mistral Small 3.1 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Kimi K2.5 leads overall 53.04 to 46.
- The clearest category separation is in multimodal & grounded, where the averages are 70.4 for Kimi K2.5 and 18.8 for Mistral Small 3.1.
- The biggest single benchmark swing is GPQA in Knowledge, with scores of 87.6% and 46.0%.
- Kimi K2.5 also has the larger context window at 256K.

## Model Snapshot

| Property | Kimi K2.5 | Mistral Small 3.1 |
|----------|----------|----------|
| Creator | Moonshot AI | Mistral |
| Type | Open Weight | Open Weight |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 256K | 128K |
| Overall Score | 53.04 | null |
| Benchmarks Covered | 68 | 7 |
| Pricing (input/output) | $0.60 / $3.00 | N/A |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Kimi K2.5 public-lane score: 41.2 (Estimated · #62/124)
- Mistral Small 3.1 public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Mistral Small 3.1 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 50.8% | Coming soon | Coming soon |
| BrowseComp | 60.6% | Coming soon | Coming soon |
| OSWorld-Verified | 63.3% | Coming soon | Coming soon |
| Claw-Eval | 52.3% | Coming soon | Coming soon |
| QwenClawBench | 54.3% | Coming soon | Coming soon |
| τ³-bench results | 65.7% | Coming soon | Coming soon |
| DeepSearchQA | 77.1% | Coming soon | Coming soon |
| DeepPlanning | 14.4% | Coming soon | Coming soon |
| Toolathlon | 27.8% | Coming soon | Coming soon |
| MCP Atlas | 29.5% | Coming soon | Coming soon |
| MCP-Tasks | 59.1% | Coming soon | Coming soon |
| WideResearch | 72.7% | Coming soon | Coming soon |
| BFCL v4 | 68.3% | Coming soon | Coming soon |
| Gert Labs | 45.88% | Coming soon | Coming soon |
| ResearchClawBench | 14.0% | Coming soon | Coming soon |
| JobBench | 8.7% | Coming soon | Coming soon |

### Coding

- Winner: Not comparable
- Kimi K2.5 public-lane score: 38.4 (Estimated · #66/148)
- Mistral Small 3.1 public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Mistral Small 3.1 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 76.8% | Coming soon | Coming soon |
| SWE-bench Verified* | 70.8% | Coming soon | Coming soon |
| LiveCodeBench v6 | 85.0% | Coming soon | Coming soon |
| SWE-bench Pro | 50.7% | Coming soon | Coming soon |
| SWE Multilingual | 73% | Coming soon | Coming soon |
| SWE-Rebench | 58.5% | Coming soon | Coming soon |
| React Native Evals | 77.2% | Coming soon | Coming soon |
| NL2Repo | 32% | Coming soon | Coming soon |
| SciCode | 48.7% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 50.8% | Coming soon | Coming soon |
| HumanEval | Coming soon | 88.4% | Coming soon |

### Reasoning

- Winner: Not comparable
- Kimi K2.5 public-lane score: 72.2 (Unranked · 3 rankable rows)
- Mistral Small 3.1 public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Mistral Small 3.1 | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 61% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Kimi K2.5 public-lane score: 70.4 (#32/54)
- Mistral Small 3.1 public-lane score: 18.8 (Unranked · 2 rankable rows)

| Benchmark | Kimi K2.5 | Mistral Small 3.1 | Winner |
|-----------|-----------|-----------|--------|
| MMMU | 84.3% | 64.0% | Kimi K2.5 |
| MMMU-Pro | 78.5% | 49.3% | Kimi K2.5 |
| RealWorldQA | 81.0% | Coming soon | Coming soon |
| OmniDocBench 1.5 | 88.8% | Coming soon | Coming soon |
| Video-MME | 87.4% | Coming soon | Coming soon |
| Video-MME (with subtitle) | 87.4% | Coming soon | Coming soon |
| Video-MME (w/o subtitle) | 83.2% | Coming soon | Coming soon |
| MathVision | 84.2% | Coming soon | Coming soon |
| We-Math | 84.7% | Coming soon | Coming soon |
| DynaMath | 84.4% | Coming soon | Coming soon |
| SimpleVQA | 71.2% | Coming soon | Coming soon |
| MMLongBench-Doc | 58.5% | Coming soon | Coming soon |
| CC-OCR | 79.7% | Coming soon | Coming soon |
| AI2D_TEST | 90.8% | Coming soon | Coming soon |
| CountBench | 94.1% | Coming soon | Coming soon |
| RefCOCO (avg) | 87.8% | Coming soon | Coming soon |
| MMVU | 80.4% | Coming soon | Coming soon |
| VideoMMMU | 86.6% | Coming soon | Coming soon |
| MLVU (M-Avg) | 85.0% | Coming soon | Coming soon |
| CharXiv | 77.5% | Coming soon | Coming soon |

### Knowledge

- Winner: Not comparable
- Kimi K2.5 public-lane score: 51.3 (Estimated · #73/181)
- Mistral Small 3.1 public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Mistral Small 3.1 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 87.6% | 46.0% | Kimi K2.5 |
| GPQA-D | 87.6% | Coming soon | Coming soon |
| SuperGPQA | 69.2% | Coming soon | Coming soon |
| MMLU-Pro | 87.1% | 66.8% | Kimi K2.5 |
| MMLU-Pro (Arcee) | 87.1% | Coming soon | Coming soon |
| MMLU-Redux | 94.5% | Coming soon | Coming soon |
| C-Eval | 94% | Coming soon | Coming soon |
| HLE | 30.1% | Coming soon | Coming soon |
| MMLU | Coming soon | 80.6% | Coming soon |
| SimpleQA | Coming soon | 10.4% | Coming soon |

### Multilingual

- Winner: Not comparable
- Kimi K2.5 public-lane score: 87.3 (#8/17)
- Mistral Small 3.1 public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Mistral Small 3.1 | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 82.3% | Coming soon | Coming soon |
| NOVA-63 | 56.0% | Coming soon | Coming soon |
| INCLUDE | 83.3% | Coming soon | Coming soon |
| PolyMath | 43.1% | Coming soon | Coming soon |
| MAXIFE | 72.8% | Coming soon | Coming soon |

### Instruction Following

- Winner: Not comparable
- Kimi K2.5 public-lane score: 85.8 (#46/128)
- Mistral Small 3.1 public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Mistral Small 3.1 | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 93.9% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- Kimi K2.5 public-lane score: 83.3 (Unranked · 7 rankable rows)
- Mistral Small 3.1 public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Mistral Small 3.1 | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 96.1% | Coming soon | Coming soon |
| AIME26 | 95.8% | Coming soon | Coming soon |
| AIME25 (Arcee) | 96.3% | Coming soon | Coming soon |
| HMMT Feb 2025 | 95.4% | Coming soon | Coming soon |
| HMMT Nov 2025 | 91.1% | Coming soon | Coming soon |
| HMMT Feb 2026 | 87.1% | Coming soon | Coming soon |
| MMAnswerBench | 81.8% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Kimi K2.5 or Mistral Small 3.1?

Kimi K2.5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Kimi K2.5 and Mistral Small 3.1?

The widest category gap is in multimodal & grounded, where the averages are 70.4 for Kimi K2.5 and 18.8 for Mistral Small 3.1.

### How many benchmarks does Kimi K2.5 cover on BenchLM?

Kimi K2.5 currently has 68 sourced benchmark scores on BenchLM.

### How many benchmarks does Mistral Small 3.1 cover on BenchLM?

Mistral Small 3.1 currently has 7 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Kimi K2.5 vs Kimi K2.5 (Reasoning)](/compare/kimi-k2-5-vs-kimi-k2-5-reasoning)
- [Mistral Small 3.1 vs Kimi K2.5 (Reasoning)](/compare/kimi-k2-5-reasoning-vs-mistral-small-3-1)
- [Kimi K2.5 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-kimi-k2-5)
- [Mistral Small 3.1 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-mistral-small-3-1)

## Explore More

- [Kimi K2.5 profile](/models/kimi-k2-5)
- [Mistral Small 3.1 profile](/models/mistral-small-3-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)